Bit-stock.



I. E. SISK.

BIT STOCK.

APPLICATION FILED SEPT-23, 1914.

l, 171 ,670, Patented Feb. 15, 1916.

2 SHEETS-SHEET I- T a HHHH" 3L NW at avwemto'a Qttomw THE COLUMBIA PLANOGRAPH co., WASHINGTON, D. c.

l. E. SISK.

BIT STOCK. APPLICATION FILED SEPT-23, I914.

1,171,670. Patented Feb. 15,1916.

2 SHEETS-SHEET 2.

THE CDLUMBIA PLANOGRAPH 60., WASHINGTON, D. c.

I attoznw by a simple adjustment of'the head block 18 away from the bearing head 8. By loosening a single set screw 6 the bearing head 8 may be disconnected from the staff 1 and the actuating chain 16 and either brought into combination with the ratchet handle 22 or the brace 25 as may be found desirable at the time. W hen used under the combination shown in F ig., 8, the presser head 11 is ap-' plied to the square shank 10 of the chuck 7.

bearing head and perpendicular to the axis on winch the chuck ournal revolves said shank being non-circular in cross section,

and interchangeable chuck-operating members formed with sockets corresponding in shape with and adapted to receive and hold. said shank, one of said operating members embodyinga straight stock and straight drive gearing the elements of which together with the above mentioned gear wheel are in a common plane parallel to said stock.

In testimony whereof I aifix my signature in presence of two witnesses.

IRA E. SISK. V

Witnesses:

HENRY ZETLET, VM. M. Porn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.? 

